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80 lines
1.7 KiB
Python
Executable File
80 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import math
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def twosCompliment(value):
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return (value^65535)+1
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def toFixed124(flt): # Floating point to 12.4 fixed point
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whole = max(-2048, min(2047, math.trunc(flt))) # Clamp to signed range
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frac = abs(flt)%1
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binary = (abs(whole)<<4) + math.trunc(16*frac)
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if (flt<0 and abs(flt)>0.06):
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binary = twosCompliment(binary)
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return binary
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def toFixed88(flt): # Floating point to 8.8 fixed point
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whole = max(-128, min(127, math.trunc(flt))) # Clamp to signed range
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frac = abs(flt)%1
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binary = (abs(whole)<<8) + math.trunc(256*frac)
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if (flt<0 and abs(flt)>0.0037):
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binary = twosCompliment(binary)
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return binary
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def main(argv):
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print ("sineTable:\t\t; 8.8 fixed point",end="")
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rowCount = 7
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for v in range(0,512):
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rowCount += 1
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if (rowCount==8):
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print ("\n\t.word ", end="")
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rowCount=0
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print ("$%04x" % (int)(math.sin((2*3.14159)/256 * v%256)*128+128), end="")
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if (rowCount<7):
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print (",", end="")
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print ("\n\nangleToVectorX:\t\t; 8.8 fixed point, counterclockwise angle, +x=(1,0)",end="")
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rowCount = 11
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for v in range(0,360):
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rowCount += 1
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if (rowCount==12):
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print ("\n\t.word ", end="")
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rowCount=0
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print ("$%04x" % toFixed88(math.cos(math.radians(v))), end="")
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if (rowCount<11):
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print (",", end="")
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print ("\n\nangleToVectorY:\t\t; 8.8 fixed point, counterclockwise angle, +x=(1,0)",end="")
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rowCount = 11
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for v in range(0,360):
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rowCount += 1
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if (rowCount==12):
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print ("\n\t.word ", end="")
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rowCount=0
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print ("$%04x" % toFixed88(math.sin(math.radians(v))), end="")
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if (rowCount<11):
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print (",", end="")
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print ("\n\n")
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if __name__ == "__main__":
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main(sys.argv[1:])
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